Method for controlling an oxygen bleaching

Details Method for controlling an oxygen bleaching Method for controlling an oxygen bleaching

1988-06-28

1989-06-20

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

162 62, 162 65, 162238, D21C 712, D21C 9147

Patent

active

048407038

ABSTRACT:
A method for controlling an oxygen-bleaching process of lignocellulosic pulp to a desired degree of delignification.
The pulp is passed at a substantially constant temperature into a bleaching reactor wherein the pulp has a substantially constant level at its outlet. The hydrostatic pressure is measured and the quantity of oxygen fed into the reactor is adjusted to reach a desired degree of delignification.

REFERENCES:
patent: 3579417 (1971-05-01), Carlsmith
patent: 3832276 (1974-08-01), Roymoulik et al.
patent: 4198266 (1980-04-01), Kirk et al.
patent: 4419184 (1983-12-01), Backlund

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